Portion of a display screen for a graphical user interface



The FIGURE is a front view of the graphical user interface for a portion of a display screen showing our new design.

The broken line showing of a portion of a display screen in FIG. 1 forms no part of the claimed design. The broken line showing of text and portions of the graphical user interface in FIG. 1 represents environmental subject matter and forms no part of the claimed design. The greyscale fill appearing in the progress bar in FIG. 1 represents a contrasting appearance from any portion of the progress bar that does not have greyscale fill. 

CLAIM The ornamental design for a portion of a display screen for a graphical user interface, as shown and described. 